Biochemist T Colin Campbell is the author behind the well-known vegan book The China Study and according to him, we should eat a low-fat vegan diet to keep us healthy.

There is a lack of evidence to support Campbell’s ideas. The book The China Study rests on an observational study – uncertain statistics – that doesn’t prove anything. Moreover, it has been demonstrated that the statistical data in the book were cherry-picked to fit the author’s preconceptions. Statistics that pointed strongly in the other direction were not included.

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Let me start by saying this: Being a vegan is fine. I find the ethical arguments compelling and I’m impressed by people who manage to avoid animal products for ethical reasons. Also, I believe that most vegan food (supplemented by vitamin B12) is healthier than a standard Western diet.

That said, I was shocked when listening to a new interview with low-fat vegan advocate Dr John McDougall. A couple of days ago he was on Jimmy Moore’s podcast and, really, you have to hear it to believe it: